When you don't pay attention in English class, a simple signage fail can become hatespeech.
"F*** OFF" (sorry, i have to censor myself because google are b****es when it comes to adsense) is the brand name of the company that makes these (probably knockoff) band shirts.They have two shelves, one for local bands and one for foreign bands, but because the person who wrote this sign, like too many people in Japan, slacked off in English class. They know enough to put words down, but not enough to realise that there is more to meaning than simply using the words as they are directly translated.
The result, predictably, is somewhat amusing.
Even more so when the sign is seen by thousands of international tourists on one of the most famous tourist streets on the planet!
